Neat car with the red-on-red colors and bench and docs.
I'm guessing this is a well known car, although I don't recall ever seeing it at a show. I'm hoping 'matching numbers' means 'born-with.'
Price seems pretty reasonable if it has the original drivetrain as claimed. Sold new at Bill Graham Chevrolet Inc, Owega, NY.
Link to 1966 L78 Chevelle auction